Brake on Front Left only (1 Viewer)

[Lamant]

I recently overhauled my front axle, and whilst doing so noted that the front calipers required and overhaul. Replaced seals and pistons on both. Eventually replaced also master cylinder as foind the old was bypassing. The problem is that from the abs module hydraulic only flows to FL. I opened directly from the abs module and there is no flow. I removed the abs module, pressed air in the R and FR port and air pass backwards but not the right way. Any help please?